/Engine/Source/Editor/LevelEditor/Public/LevelViewportLayout.h
Optionally return this entity as anSLevelViewport. Legacy function for interop with code that used to deal directly with SLevelViewports
virtual [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SLevelViewport](API\Editor\LevelEditor\SLevelViewport) > AsLevelViewport() const